Truck tonneau



FIG. 1 is a perspective view of a truck tonneau showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a front plan view thereof; and,

FIG. 5 is a side plan view thereof.

The broken line showing of environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a truck tonneau, as shown and described. 